US3602849A
Expired / Lapsed
US
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Broadband gyrator circuit
Assignee: Westinghouse Electric Corp
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Filing: 1969-05-27
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Granted: 1971-08-31
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Expires: 1989-05-27
Abstract
Abstract Circuitry for greatly extending the high-performance bandwidth of a gyrator by controlling the negative resistance of the effective impedance. The high performance bandwidth is extended by realizing the gyrator transconductances with a pair of complex poles, instead of real poles.
Inventors
- 👤 Philip R Geffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:38
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/40; H03H11/42
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
52 words
A broadband gyrator circuit comprising in combination; first and second transconductance means of opposite signs, each including amplifier means having high input and output impedances; and filter means cascaded with each amplifier means for providing a pair of complex poles on the unit circle of the complex-frequency plane of each transconductance means.
Claim 2
Dependent Claim
52 words
A broadband gyrator circuit comprising in combination; first and second transconductance means of opposite signs, each including amplifier means having high input and output impedances; and filter means cascaded with each amplifier means for providing a pair of complex poles on the unit circle of the complex-frequency plane of each transconductance means.
Claim 3
Dependent Claim
64 words
The combination of claim 1 wherein said filter means includes a first low pass active filter cascaded in a first circuit with the amplifier means of said first transconductance means and a second low pass active filter cascaded in a second circuit with the amplifier means of said second transconductance means; and means for connecting said first circuit and said second circuit in parallel.
Claim 4
Dependent Claim
25 words
The combination of claim 2 wherein each said low pass active filter includes resistance means and capacitive means in combination with a voltage follower stage.
Claim 5
Dependent Claim
59 words
The combination of claim 3 wherein said resistance means includes first resistance means and second resistance means and wherein the magnitudes of each capacitive means, for a normalized circuit, are substantially equal and equivalent to 1 farad while the magnitudes of said first and second resistance means have a ratio of substantially 16 to 1 for said normalized circuit.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |